ccache

ccache is an open source compiler cache designed to act as a caching pre-processor to C/C++ compilers.

It uses the -E compiler switch and a hash to detect when a compilation can be satisfied from cache. Supports C++, C, Objective-C++ and Objective-C.

What is new in this release:

• Bug fixes:
• The EAGAIN signal is now handled correctly when emitting cached stderr output. This fixes a problem triggered by large error outputs from the compiler.
• Subdirectories in the cache are no longer created in read-only mode.
• Fixed so that ccache's log file descriptor is not made available to the compiler.
• Improved error reporting when failing to create temporary stdout/stderr files when executing the compiler.
• Disappearing temporary stdout/stderr files are now handled gracefully.
• Other:
• Fixed test suite to work on ecryptfs.

What is new in version 3.1.7:

• Several minor bugs have been fixed: failure when creating files in the cache directory has been made fatal.
• Recognition and hashing of GCC plugins specified with -fplugin=file has been added. CPATH, C_INCLUDE_PATH, and similar environment variables are now added to the hash to avoid false cache hits when such variables have changed.
• The GCC bug compatibility introduced in ccache 3.1.5 for -MT/-MQ options with concatenated arguments has been reverted.

What is new in version 3.1.5:

• New features and improvements:
• Added a new statistics counter named "called for preprocessing".
• The original command line is now logged to the file specified with CCACHE_LOGFILE.
• Improved error logging when system calls fail.
• Added support for rewriting absolute paths in -F/-iframework GCC options.
• Improved order of statistics counters in ccache -s output.
• Bug fixes:
• The -MF/-MT/-MQ options with concatenated argument are now handled correctly when they are last on the commandline.
• ccache is now bug compatible with GCC for the -MT/-MQ options with concatenated arguments.
• Fixed a minor memory leak.
• Systems that lack (and don't need to be linked with) libm are now supported.

What is new in version 3.1.4:

• A bug fix release

What is new in version 3.1.3:

• The -MFarg, -MTarg, and -MQarg compiler options (i.e., without a space between the option and argument) are now handled correctly.

What is new in version 3.1.2:

• The compiler options -fdump-* are now correctly detected as too hard to cache.
• NULL return values from malloc/calloc of zero bytes are now handled correctly.
• An issue when parsing precompiler output on AIX has been fixed.
• Documentation on which information is included in the hash sum has been improved.
• The test suite portability has been improved.

What is new in version 3.1.1:

• Non-regular include files are now handled correctly.
• CRC errors are detected when decompressing compressed files in the cache.
• A potential object file corruption race on NFS has been fixed.
• Documentation has been corrected.
• Configure detection of ar is now done properly.

What is new in version 3.1:

• Support has been added for hashing the output of a custom command to identify the compiler.
• Compilations that use precompiled headers are now supported.
• Behaviour on NFS mounts has been improved.
• Some bugs have been fixed.

What is new in version 3.0.1:

• The statistics counter "called for link" is now correctly updated when linking with a single object file.
• A problem with out-of-source builds has been fixed.